Overview
The SN74AHC74QDRQ1 is a dual positive-edge-triggered D-type flip-flop integrated circuit produced by Texas Instruments. This device is part of the AHC (Advanced High-Speed CMOS) logic family and is designed for automotive applications, meeting the AEC-Q100 qualification standards. It features two independent D-type flip-flops, each with asynchronous preset and clear inputs. The device operates over a wide temperature range of -40°C to 125°C, making it suitable for various automotive and industrial environments.
Key Specifications
| Parameter | Description | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Operating Temperature Range | -40°C to 125°C | -40 | 125 | °C | |
| Operating Voltage Range | 2 V to 6 V | 2 | 6 | V | |
| Input Voltage (VIL) | Low-level input voltage at VCC = 2 V | 0.5 | 1.8 | V | |
| Input Voltage (VIH) | High-level input voltage at VCC = 2 V | 1.5 | 3.5 | V | |
| Output Voltage (VOH) | Minimum dynamic output voltage high | 4.7 | V | ||
| Output Voltage (VOL) | Maximum dynamic output voltage low | -0.8 | 0.8 | V | |
| Propagation Delay (tPLH/tPHL) | CLK to Q or Q at CL = 15 pF | 6.7 | 11.9 | 14 | ns |
| Hold Time (th) | Data after CLK↑ | 0.5 | 5.8 | ns | |
| Power Dissipation Capacitance (Cpd) | No load, f = 1 MHz | 32 | pF |
Key Features
- AEC-Q100 Qualified: Suitable for automotive applications with a temperature grade 1 rating (-40°C to 125°C).
- Buffered Inputs: Ensures stable input signals.
- Positive and Negative Input Clamp Diodes: Protects against voltage spikes.
- Wide Operating Voltage Range: Operates from 2 V to 6 V.
- Low Power Consumption: Significant power reduction compared to LSTTL logic ICs.
- High Fanout Capability: Supports up to 10 LSTTL loads.
- Balanced CMOS Push-Pull Outputs: Allows the device to sink and source similar currents, ensuring balanced output performance.
Applications
- Automotive Systems: Suitable for various automotive applications due to its AEC-Q100 qualification and wide temperature range.
- Clock Signal Division: Can be used to divide a clock signal by 2 or 4.
- Toggle Switch Conversion: Can convert a momentary switch to a toggle switch.
- Industrial Control Systems: Used in industrial environments where reliable and robust logic functions are required.
Q & A
- What is the operating temperature range of the SN74AHC74QDRQ1?
The operating temperature range is -40°C to 125°C.
- What is the voltage range for the SN74AHC74QDRQ1?
The device operates from 2 V to 6 V.
- What type of flip-flops does the SN74AHC74QDRQ1 contain?
The device contains two independent D-type positive-edge-triggered flip-flops.
- Does the SN74AHC74QDRQ1 have asynchronous preset and clear inputs?
Yes, each flip-flop has asynchronous preset and clear inputs.
- What is the maximum propagation delay for the SN74AHC74QDRQ1?
The maximum propagation delay (tPLH/tPHL) from CLK to Q or Q at CL = 15 pF is 14 ns.
- What is the power dissipation capacitance of the SN74AHC74QDRQ1?
The power dissipation capacitance (Cpd) is 32 pF at no load and f = 1 MHz.
- Is the SN74AHC74QDRQ1 AEC-Q100 qualified?
Yes, the device is AEC-Q100 qualified for automotive applications.
- What is the fanout capability of the SN74AHC74QDRQ1?
The device supports up to 10 LSTTL loads.
- What are the typical applications of the SN74AHC74QDRQ1?
Typical applications include converting a momentary switch to a toggle switch, dividing a clock signal, and use in automotive and industrial control systems.
- What are the package options for the SN74AHC74QDRQ1?
The device is available in SOIC (14-pin) and TSSOP (14-pin) packages.
